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authorJamie Liu <jamieliu@google.com>2019-01-07 15:39:14 -0800
committerShentubot <shentubot@google.com>2019-01-07 15:40:26 -0800
commitdc4849e49c354ee43256a4a117a217f86767a059 (patch)
tree51d0023068e0985b542d11f61f793972da72bbdb /pkg/sentry
parent901ed5da44f1ef28c67ce942eef978342a5f8766 (diff)
Add usermem support for arm64 platform.
Signed-off-by: Haibo Xu <haibo.xu@arm.com> PiperOrigin-RevId: 228249611 Change-Id: I1046e70bec4274f18b9948eefd6b0d546e4c48bb
Diffstat (limited to 'pkg/sentry')
-rw-r--r--pkg/sentry/usermem/BUILD1
-rw-r--r--pkg/sentry/usermem/usermem_arm64.go53
2 files changed, 54 insertions, 0 deletions
diff --git a/pkg/sentry/usermem/BUILD b/pkg/sentry/usermem/BUILD
index 69ba919e0..dae41ed0e 100644
--- a/pkg/sentry/usermem/BUILD
+++ b/pkg/sentry/usermem/BUILD
@@ -24,6 +24,7 @@ go_library(
"bytes_io.go",
"bytes_io_unsafe.go",
"usermem.go",
+ "usermem_arm64.go",
"usermem_x86.go",
],
importpath = "gvisor.googlesource.com/gvisor/pkg/sentry/usermem",
diff --git a/pkg/sentry/usermem/usermem_arm64.go b/pkg/sentry/usermem/usermem_arm64.go
new file mode 100644
index 000000000..7fd4ce963
--- /dev/null
+++ b/pkg/sentry/usermem/usermem_arm64.go
@@ -0,0 +1,53 @@
+// Copyright 2019 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build arm64
+
+package usermem
+
+import (
+ "encoding/binary"
+ "syscall"
+)
+
+const (
+ // PageSize is the system page size.
+ // arm64 support 4K/16K/64K page size,
+ // which can be get by syscall.Getpagesize().
+ // Currently, only 4K page size is supported.
+ PageSize = 1 << PageShift
+
+ // HugePageSize is the system huge page size.
+ HugePageSize = 1 << HugePageShift
+
+ // PageShift is the binary log of the system page size.
+ PageShift = 12
+
+ // HugePageShift is the binary log of the system huge page size.
+ // Should be calculated by "PageShift + (PageShift - 3)"
+ // when multiple page size support is ready.
+ HugePageShift = 21
+)
+
+var (
+ // ByteOrder is the native byte order (little endian).
+ ByteOrder = binary.LittleEndian
+)
+
+func init() {
+ // Make sure the page size is 4K on arm64 platform.
+ if size := syscall.Getpagesize(); size != PageSize {
+ panic("Only 4K page size is supported on arm64!")
+ }
+}